cement {AICcmodavg} | R Documentation |
This data set illustrates the heat expended (calories) from mixtures of four different ingredients of Portland cement expressed as a percentage by weight.
data(cement)
A data frame with 13 observations on the following 5 variables.
x1
x2
x3
x4
y
Burnham and Anderson (2002, p. 101) use this data set originally from Woods et al. (1932) to select among a set of multiple regression models.
Burnham, K. P., Anderson, D. R. (2002) Model Selection and Multimodel Inference: a practical information-theoretic approach. Second edition. Springer: New York.
Woods, H., Steinour, H. H., Starke, H. R. (1932) Effect of composition of Portland cement on heat evolved during hardening. Industrial and Engineering Chemistry 24, 1207–1214.
data(cement) ## maybe str(cement) ; plot(cement) ...